A circular, single or multipiece item, metallic or nonmetallic in composition, designed to be fitted in a circumferential groove in a piston and to spring outward against the cylinder wall to function as a seal or wiper. It is supplied in various cross-sectional shapes and is cut through at one point to allow for installation in the piston ring groove. It may include an expander. Excludes packing, preformed; retainer, oil seal; retainer, packing; ring, retaining; ring wiper; and seal ring, metal.
Classification: Parts for steam turbines
NSN 6110-00-473-5111
NSN 5905-01-205-4952
NSN 6620-01-246-4314
NSN 5925-01-333-1610
NSN 5930-01-129-4313
NSN 5945-01-040-7705
NSN 5945-01-250-8430
NSN 5915-01-170-9732
NSN 5960-01-485-7532
NSN 5998-00-242-8594
NSN 5999-01-153-1280
NSN 6240-01-142-2239